51501025624240 has 80 divisors (see below), whose sum is σ = 119820018528000. Its totient is φ = 20586627504896.

The previous prime is 51501025624201. The next prime is 51501025624261. The reversal of 51501025624240 is 4242652010515.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 51501025624240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1027467819 + ... + 1027517941.

It is an arithmetic number, because the mean of its divisors is an integer number (1497750231600).

Almost surely, 2^{51501025624240} is an apocalyptic number.

It is an amenable number.

51501025624240 is an abundant number, since it is smaller than the sum of its proper divisors (68318992903760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51501025624240 is a wasteful number, since it uses less digits than its factorization.

51501025624240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58474 (or 58468 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 37.

Adding to 51501025624240 its reverse (4242652010515), we get a palindrome (55743677634755).

The spelling of 51501025624240 in words is "fifty-one trillion, five hundred one billion, twenty-five million, six hundred twenty-four thousand, two hundred forty".